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                        Serializer序列化器
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                            <b>3.1.</b>
                        
                        定义Serializer
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                        <h1 id="&#x5F02;&#x5E38;&#x5904;&#x7406;-exceptions">&#x5F02;&#x5E38;&#x5904;&#x7406; Exceptions</h1>
<p>REST framework&#x63D0;&#x4F9B;&#x4E86;&#x5F02;&#x5E38;&#x5904;&#x7406;&#xFF0C;&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x81EA;&#x5B9A;&#x4E49;&#x5F02;&#x5E38;&#x5904;&#x7406;&#x51FD;&#x6570;&#x3002;</p>
<pre><code class="lang-python"><span class="hljs-keyword">from</span> rest_framework.views <span class="hljs-keyword">import</span> exception_handler

<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">custom_exception_handler</span><span class="hljs-params">(exc, context)</span>:</span>
    <span class="hljs-comment"># &#x5148;&#x8C03;&#x7528;REST framework&#x9ED8;&#x8BA4;&#x7684;&#x5F02;&#x5E38;&#x5904;&#x7406;&#x65B9;&#x6CD5;&#x83B7;&#x5F97;&#x6807;&#x51C6;&#x9519;&#x8BEF;&#x54CD;&#x5E94;&#x5BF9;&#x8C61;</span>
    response = exception_handler(exc, context)

    <span class="hljs-comment"># &#x5728;&#x6B64;&#x5904;&#x8865;&#x5145;&#x81EA;&#x5B9A;&#x4E49;&#x7684;&#x5F02;&#x5E38;&#x5904;&#x7406;</span>
    <span class="hljs-keyword">if</span> response <span class="hljs-keyword">is</span> <span class="hljs-keyword">not</span> <span class="hljs-keyword">None</span>:
        response.data[<span class="hljs-string">&apos;status_code&apos;</span>] = response.status_code

    <span class="hljs-keyword">return</span> response
</code></pre>
<p>&#x5728;&#x914D;&#x7F6E;&#x6587;&#x4EF6;&#x4E2D;&#x58F0;&#x660E;&#x81EA;&#x5B9A;&#x4E49;&#x7684;&#x5F02;&#x5E38;&#x5904;&#x7406;</p>
<pre><code class="lang-python">REST_FRAMEWORK = {
    <span class="hljs-string">&apos;EXCEPTION_HANDLER&apos;</span>: <span class="hljs-string">&apos;my_project.my_app.utils.custom_exception_handler&apos;</span>
}
</code></pre>
<p>&#x5982;&#x679C;&#x672A;&#x58F0;&#x660E;&#xFF0C;&#x4F1A;&#x91C7;&#x7528;&#x9ED8;&#x8BA4;&#x7684;&#x65B9;&#x5F0F;&#xFF0C;&#x5982;&#x4E0B;</p>
<pre><code class="lang-python">REST_FRAMEWORK = {
    <span class="hljs-string">&apos;EXCEPTION_HANDLER&apos;</span>: <span class="hljs-string">&apos;rest_framework.views.exception_handler&apos;</span>
}
</code></pre>
<p>&#x4F8B;&#x5982;&#xFF1A;</p>
<p>&#x8865;&#x5145;&#x4E0A;&#x5904;&#x7406;&#x5173;&#x4E8E;&#x6570;&#x636E;&#x5E93;&#x7684;&#x5F02;&#x5E38;</p>
<pre><code class="lang-python"><span class="hljs-keyword">from</span> rest_framework.views <span class="hljs-keyword">import</span> exception_handler <span class="hljs-keyword">as</span> drf_exception_handler
<span class="hljs-keyword">from</span> rest_framework <span class="hljs-keyword">import</span> status
<span class="hljs-keyword">from</span> django.db <span class="hljs-keyword">import</span> DatabaseError

<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">exception_handler</span><span class="hljs-params">(exc, context)</span>:</span>
    response = drf_exception_handler(exc, context)

    <span class="hljs-keyword">if</span> response <span class="hljs-keyword">is</span> <span class="hljs-keyword">None</span>:
        view = context[<span class="hljs-string">&apos;view&apos;</span>]
        <span class="hljs-keyword">if</span> isinstance(exc, DatabaseError):
            print(<span class="hljs-string">&apos;[%s]: %s&apos;</span> % (view, exc))
            response = Response({<span class="hljs-string">&apos;detail&apos;</span>: <span class="hljs-string">&apos;&#x670D;&#x52A1;&#x5668;&#x5185;&#x90E8;&#x9519;&#x8BEF;&apos;</span>}, status=status.HTTP_507_INSUFFICIENT_STORAGE)

    <span class="hljs-keyword">return</span> response
</code></pre>
<h3 id="rest-framework&#x5B9A;&#x4E49;&#x7684;&#x5F02;&#x5E38;">REST framework&#x5B9A;&#x4E49;&#x7684;&#x5F02;&#x5E38;</h3>
<ul>
<li>APIException  &#x6240;&#x6709;&#x5F02;&#x5E38;&#x7684;&#x7236;&#x7C7B;</li>
<li>ParseError  &#x89E3;&#x6790;&#x9519;&#x8BEF;</li>
<li>AuthenticationFailed  &#x8BA4;&#x8BC1;&#x5931;&#x8D25;</li>
<li>NotAuthenticated  &#x5C1A;&#x672A;&#x8BA4;&#x8BC1;</li>
<li>PermissionDenied  &#x6743;&#x9650;&#x51B3;&#x7EDD;</li>
<li>NotFound  &#x672A;&#x627E;&#x5230;</li>
<li>MethodNotAllowed  &#x8BF7;&#x6C42;&#x65B9;&#x5F0F;&#x4E0D;&#x652F;&#x6301;</li>
<li>NotAcceptable  &#x8981;&#x83B7;&#x53D6;&#x7684;&#x6570;&#x636E;&#x683C;&#x5F0F;&#x4E0D;&#x652F;&#x6301;</li>
<li>Throttled  &#x8D85;&#x8FC7;&#x9650;&#x6D41;&#x6B21;&#x6570;</li>
<li>ValidationError  &#x6821;&#x9A8C;&#x5931;&#x8D25;</li>
</ul>

                    
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